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Finding the Fourth Proportional to 8,203.20, 12,304.80 and 7,310.40

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Solution

The fourth proportional to 8,203.20, 12,304.80 and 7,310.40 is: 10,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,203.20 : 12,304.80 = 7,310.40 : x
  2. Step 2: Convert to fraction form
    8,203.20/12,304.80 = 7,310.40/x
  3. Step 3: Cross multiply
    8,203.20x = 12,304.80 × 7,310.40
  4. Step 4: Simplify right side
    8,203.20x = 89,953,009.92
  5. Step 5: Solve for x
    x = 89,953,009.92/8,203.20
  6. Step 6: Final answer
    x = 10,965.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.